package com.imddysc.springbootbatch001.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringContextUtils implements ApplicationContextAware {

	private static ApplicationContext applicationContext = null;

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		if (SpringContextUtils.applicationContext == null) {
			SpringContextUtils.applicationContext = applicationContext;
		}

	}

	/** 获取applicationContext */
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	/** 通过name获取 Bean */
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	/** 通过class获取Bean */
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	/** 通过name, 以及Clazz返回指定的Bean */
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}
	

	/** 是否包含Bean */
    public static boolean containsBean(String name) {
        return getApplicationContext().containsBean(name);
    }

    /** 判断该Bean是否是单例 */
    public static boolean isSingleton(String name) {
        return getApplicationContext().isSingleton(name);
    }

    /** 根据类型查找Bean */
    public static Class<? extends Object> getType(String name) {
        return getApplicationContext().getType(name);
    }

}
